diff --git a/cmd/owl/webmention.go b/cmd/owl/webmention.go
index ff558bc..b845e36 100644
--- a/cmd/owl/webmention.go
+++ b/cmd/owl/webmention.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"h4kor/owl-blogs"
+	"sync"
 
 	"github.com/spf13/cobra"
 )
@@ -56,13 +57,18 @@ var webmentionCmd = &cobra.Command{
 
 			webmentions := post.OutgoingWebmentions()
 			println("Found ", len(webmentions), " links")
+			wg := sync.WaitGroup{}
+			wg.Add(len(webmentions))
 			for _, webmention := range webmentions {
-				err = post.SendWebmention(webmention)
-				if err != nil {
-					println("Error sending webmentions: ", err.Error())
-				} else {
-					println("Webmention sent to ", webmention.Target)
-				}
+				go func(webmention owl.WebmentionOut) {
+					defer wg.Done()
+					err = post.SendWebmention(webmention)
+					if err != nil {
+						println("Error sending webmentions: ", err.Error())
+					} else {
+						println("Webmention sent to ", webmention.Target)
+					}
+				}(webmention)
 			}
 			return nil
 		}
diff --git a/post.go b/post.go
index f136910..70b898f 100644
--- a/post.go
+++ b/post.go
@@ -305,6 +305,12 @@ func (post *Post) ScanForLinks() error {
 
 func (post *Post) SendWebmention(webmention WebmentionOut) error {
 	defer post.PersistOutgoingWebmention(&webmention)
+
+	// if last scan is less than 7 days ago, don't send webmention
+	if webmention.ScannedAt.After(time.Now().Add(-7*24*time.Hour)) && !webmention.Supported {
+		return nil
+	}
+
 	webmention.ScannedAt = time.Now()
 
 	resp, err := post.user.repo.HttpClient.Get(webmention.Target)
diff --git a/post_test.go b/post_test.go
index c4669b1..d14a035 100644
--- a/post_test.go
+++ b/post_test.go
@@ -375,6 +375,38 @@ func TestCanSendWebmention(t *testing.T) {
 	}
 }
 
+func TestSendWebmentionOnlyScansOncePerWeek(t *testing.T) {
+	repo := getTestRepo(owl.RepoConfig{})
+	repo.HttpClient = &MockHttpClient{}
+	repo.Parser = &MockHtmlParser{}
+	user, _ := repo.CreateUser("testuser")
+	post, _ := user.CreateNewPost("testpost")
+
+	webmention := owl.WebmentionOut{
+		Target:    "http://example.com",
+		ScannedAt: time.Now().Add(time.Hour * -24 * 6),
+	}
+
+	post.PersistOutgoingWebmention(&webmention)
+	webmentions := post.OutgoingWebmentions()
+	webmention = webmentions[0]
+
+	err := post.SendWebmention(webmention)
+	if err != nil {
+		t.Errorf("Error sending webmention: %v", err)
+	}
+
+	webmentions = post.OutgoingWebmentions()
+
+	if len(webmentions) != 1 {
+		t.Errorf("Expected 1 webmention, got %d", len(webmentions))
+	}
+
+	if webmentions[0].ScannedAt != webmention.ScannedAt {
+		t.Errorf("Expected ScannedAt to be unchanged. Expected: %v, got %v", webmention.ScannedAt, webmentions[0].ScannedAt)
+	}
+}
+
 func TestSendingMultipleWebmentions(t *testing.T) {
 	repo := getTestRepo(owl.RepoConfig{})
 	repo.HttpClient = &MockHttpClient{}